It's not officially winter yet, but for this guy, it's beginning to look a lot like Christmas. Official caption:

SAN FRANCISCO, CA - NOVEMBER 15: Pike, a 30 year old Polar Bear rolls in man made snow at the San Francisco Zoo on November 15, 2012 in San Francisco, California. Two San Francisco Zoo Polar Bears, Pike (30) and Ulu (32)celebrated their birthdays with 10 tons of man made snow and special treats. (Photo by Justin Sullivan/Getty Images)